Emery-wheel dresser



Aug. 21, 1923. @,Mjsa

E. N. PAGELSEN EMERY WHEEL DRES SER Filed Sept. 9. 1921 JNVENTOR.

Patented ug. 21, 1923.

' a! .E sr fr s EDWARD N. PAGDLSDN, or DETROIT, MrcHIGAN, nssIeNoR To ROLAND r. Pinon COMPANY, OF'MIDDAND, MICHIGAN, A CORPORATION yor IIIICHIGAN.

EMERY-WHEEL DRESSER.

Application filed ySeptember a citizenY of the YUnited States, and residmg at Detroit, in the county of Wayne and State of Michigan, have invented new and lmproved Emery-Wheel Dressers, of which the following is a specification.

This invention relates to the construction of the holder for the dressing cutter cylinder for truing grinding wheels, andits object is to provide a simple and easily constructed holder which will permit the ready adjustment of the bearings of the cutter cylinder. This invention consistsV in the details of construction illustrated in the accompanying drawingand particularly pointed out in the claims.

In the drawing, F ig.'v l is a section of this dressing tool on the line 1-1 of Fig. 2, the sleeve and the cutters thereon being in elevation. Fig. 2 is a section on the line 2 2 of Fig. 1. Fig. 3 is an elevation of a cutter disk. Y

Similar reference characters refer to like parts throughout the several views. Y

The holder for the cutters consists of a handle or shank 1 and a head 2, formed with approximately parallel and alined hubs 3 for the shaft 4, and a hood 5 which has a narrow slit 6 to permit the hubs. 3 Vand the sides 7 which support these hubs to be. forced toward each other. That portion of the body extending between the hubs 3 and receiving the threaded end ofthe shank 1 may be termed a yoke.' When made of good tough cast iron, these hubs may be forced to-V ward each other more than one one-hundredth of an inch for each inch of distance from the center of the shaft 4 to the adjacent wall of 40 the head in alinement with the handle, without damage to the metal. When made of malleable iron or cast steel, then this movement may be much greater.

Mounted within the head is a sleeve 8 hav-` ing a shoulder 9 against which the cutter disks 10 are positioned. The bearing portion of the sleeve is formed with flats 12 is n be engaged by the flat portions 13 of the bore of these disks. These cutters are preferably formed with an uneven number of teeth 14 so that when assembled, the teeth of adjacent cutters alternate, as indicated in Fig. 1.

The teeth have parallel sides and are thus of uniform cross section throughout their lengths. The cutters are rigidly held in po- A the washers 19.

9, 1921.Y serial No. 499,421:v

sition Vby the nut 15.- The lsleevefnut and Vcutters constitute a cutter vcyli nder.`iif,`

The sleeve 8 is counterbored at itsends to yreceive the bearing rings 16 which vrun on the balls 17, and these turn run on the inner rings 18 which areti'ght butslidable on'theV shaft 4. A washer 19 is rotatably fitted in each counterbore'in the ends of theV sleeve 8 and prevents theentrance of grit, `and these washersbear against the hubs 3 65 and the' bearing rings 18. The hubs are drawn toward each other vby the nuts 20.011 the ends of the shaft 4.

The inner endsofl the hubs3 aremilled with great accuracy .and the'length of theV 70VV sleeve 8 with its bearings and thewashers 19 1s made substantially as great as possible f and still permit them to be positioned.

Thereafter the shaft 4 is introducedand the nuts 2O screwed up until the hubs 3 are 75 drawn toward each other suiciently to properly adjustthe ,bearings through vpressure on' It will be noticed that the bearing faces of the shoulder'9'and of thenut 15 are re- 80,

lieved so as to cause the pressure of these two to be exerted along their peripheries. This avoidsthe danger of aV firm grip on the cutter disks being lost through the presence of small iinsalongthe edges of theholes 85 these cutters;

VVhenthe cutters are worn `outthey may bev replaced by taking out the-bolt 4,.remov ing the sleeve and taking off the nut 15. New sets of cutterV disks are supplied properly a's- 90V sembled and tied together by a wire'wrapping so they may heV mounted onrthe sleevev with least loss ofv time. Should an'outer bearing ring 16 become injured'it' can readiw ly be removed by driving it out by means of -V a curved tool, the conical-bores ,22 of the sleeve 8 readily permitting this'operation.

The proportions and the details of the several' parts of this dressing tool may all' be changed by those skilled in the art without Y ings, cutter disks mounted onfsaidsleeve, and nuts "on the oter ends of the boltto draw the hubs toward each other to adjust said bear- 2. In atdre'ssing tool,'a'cutter,cylinder and a. bolt extending therethrough, adjustable bearings in the ends of said cutter cylinder, a head embodying alined hubs and slitted at right angles to said 'b'o'lt to receiye the bolt and a yoke Qonnecting the hugbs, and nuts on the'ends of fthe bo'lt to draw 'the l'hubs toyvard each other rtoadjuist :the bearings;

3. 'Ina dressing tool a cut'terfcylinder and a Ibolt "extending therethrough, adjustable bearings in the ends of said cutter cylinder, a 15 jhead embodying alined hubs to receive the bolt vand a yoke Connecting fthe jhubs, and

nuts on the ends of the bolt to draw the hubs toward `each other to adjust the bearings,

said head being formed With a tWo part N 

